MC-16424When you block with a sword in creative, the first swing doesn't break blocks
Duplicate
MC-28444Blocks do not break on the first swing during maintained right click actions
Incomplete
MC-28445Blocks do not break on the first swing if you try to break air
Incomplete
No
I discovered something related to this, but broadened to all right click actions, so created a new issue.
I just tested it, and both this and the related issue are still concerns. I will update the versions.